You can always have a beer with someone you respect but totally disagree with. On a forum it is easier to get inflamed over a difference of opinion.
I guess a computer screen is like the same protection we feel when in the safe confines of a car.
That is if i were walking down the street and another person and myself bumped into each other as we passed we would both offer a polite apology and move on. If we were in a car we would be yelling abuse at each other.
That is because when we are with people we project what we want others to think we are, dignified and well mannered people.
In the car, well that is who we really are. Insecure individuals who want to blame others for everything and vindicate ourselves.
behind a computer, that sits somewhere in the middle i guess.